The set is new. Never been worn (it might have some detergent scent as it was kept together with other clothes I don’t wear in a vacuum bag) It doesn’t have the tag anymore. It is size S, but it is very stretchy ,and it might work for size M without a problem. It doesn’t come with the waist belt. It is very light and comfortable. Please ask for all the details necessary before you purchase! I don’t accept returns!